<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>2_回调函数形式的ref</title>
</head>

<body>
  <!-- 准备好一个“容器” -->
  <div id="test"></div>

  <!-- 引入react核心库 -->
  <script type="text/javascript" src="../js/react.development.js"></script>
  <!-- 引入react-dom，用于支持react操作DOM -->
  <script type="text/javascript" src="../js/react-dom.development.js"></script>
  <!-- 引入babel，用于将jsx转为js -->
  <script type="text/javascript" src="../js/babel.min.js"></script>

  <!-- 此处一定要写babel -->
  <script type="text/babel">
    // 1. 创建组件
    class MyComponent extends React.Component {

      // 展示左侧输入框的数据
      showData = () => {
        const {input1} = this
        console.log(input1.value)
      }

      showData2 = () => {
        const {input2} = this
        console.log(input2.value)
      }

      render() {
        return (
          <div>
            <input ref={currentNode=>this.input1 = currentNode} type="text" placeholder="点击按钮提示数据" />&nbsp;
            <button ref="button" onClick={this.showData}>点我提示左侧的数据</button>&nbsp;
            <input ref={c=>this.input2 = c} type="text" placeholder="失去焦点提示数据" onBlur={this.showData2} />
          </div>
        )
      }
    }
    // 2. 渲染组件到页面
    ReactDOM.render(<MyComponent />, document.getElementById('test'))
  </script>
</body>

</html>